/*
 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package com.oracle.truffle.api.instrumentation;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

final class PropChangeSupport {
    private final AllocationReporter source;
    // Using FQN to avoid mx to generate dependency on java.desktop JDK9 module
    private final List<Object> propSupport = new CopyOnWriteArrayList<>();

    PropChangeSupport(AllocationReporter source) {
        this.source = source;
    }

    void addPropertyChangeListener(java.beans.PropertyChangeListener listener) {
        propSupport.add(listener);
    }

    void removePropertyChangeListener(java.beans.PropertyChangeListener listener) {
        propSupport.remove(listener);
    }

    void firePropertyChange(String prop, Object old, Object n) {
        if (propSupport.isEmpty()) {
            return;
        }
        // Using FQN to avoid mx to generate dependency on java.desktop JDK9 module
        final java.beans.PropertyChangeEvent ev = new java.beans.PropertyChangeEvent(source, prop, old, n);
        for (java.beans.PropertyChangeListener l : propSupport.toArray(new java.beans.PropertyChangeListener[0])) {
            l.propertyChange(ev);
        }
    }

}
